Keep flying sparks from damaging your machinery and surroundings when welding or grinding. Stick this film on vertical surfaces where sparks can roll off, and it will prevent them from burning through. Unlike welding blankets, this film won’t shift during use, so there’s no need to check everything remains covered. When you’re done, just peel it off—it won’t leave a residue. Cut it to the shape and size you need with scissors. Sparks that rest on this film may eventually burn through, so you should use a welding blanket for horizontal surfaces.